PangoContext* wxApp::GetPangoContext()
{
static PangoContext *s_pangoContext = NULL;
if ( !s_pangoContext )
{
Display *dpy = wxGlobalDisplay();
#ifdef HAVE_PANGO_XFT
int xscreen = DefaultScreen(dpy);
static int use_xft = -1;
if (use_xft == -1)
{
wxString val = wxGetenv( L"GDK_USE_XFT" );
use_xft = val == L"1";
}
if (use_xft)
s_pangoContext = pango_xft_get_context(dpy, xscreen);
else
#endif // HAVE_PANGO_XFT
s_pangoContext = pango_x_get_context(dpy);
if (!PANGO_IS_CONTEXT(s_pangoContext))
{
wxLogError( wxT("No pango context.") );
}
}
return s_pangoContext;
}
static PangoContext *
pangox_view_get_context (gpointer instance)
{
XViewer *x = (XViewer *) instance;
PangoContext *context;
PangoMatrix matrix = {0., 0., 0., 0., 0., 0.};
context = pango_x_get_context (x->display);
/* We set an all-zero matrix on the context, to negotiate that
* this backend doesn't support transformations.
*/
pango_context_set_matrix (context, &matrix);
return context;
}
static void
_vte_pango_x_start(struct _vte_draw *draw)
{
struct _vte_pango_x_data *data;
Display *display;
GdkDrawable *drawable;
int x_offs, y_offs;
data = (struct _vte_pango_x_data*) draw->impl_data;
display = gdk_x11_drawable_get_xdisplay(draw->widget->window);
if (data->ctx != NULL) {
g_object_unref(data->ctx);
}
data->ctx = pango_x_get_context(display);
if (data->layout != NULL) {
g_object_unref(data->layout);
}
data->layout = pango_layout_new(data->ctx);
if (data->font != NULL) {
pango_layout_set_font_description(data->layout, data->font);
}
if (data->gc != NULL) {
g_object_unref(data->gc);
}
data->gc = gdk_gc_new(draw->widget->window);
gdk_rgb_find_color(gdk_drawable_get_colormap(draw->widget->window),
&data->color);
gdk_window_get_internal_paint_info(draw->widget->window, &drawable,
&x_offs, &y_offs);
data->drawable = gdk_x11_drawable_get_xid(drawable);
data->x_offs = x_offs;
data->y_offs = y_offs;
}
static void
_vte_pango_x_set_text_font(struct _vte_draw *draw,
const PangoFontDescription *fontdesc,
VteTerminalAntiAlias antialias)
{
PangoContext *ctx;
Display *display;
PangoLayout *layout;
PangoLayoutIter *iter;
PangoRectangle ink, logical;
gunichar full_codepoints[] = {VTE_DRAW_DOUBLE_WIDE_IDEOGRAPHS};
GString *full_string;
gint full_width;
guint i;
struct _vte_pango_x_data *data;
data = (struct _vte_pango_x_data*) draw->impl_data;
display = gdk_x11_display_get_xdisplay(gtk_widget_get_display(draw->widget));
if (data->ctx != NULL) {
g_object_unref(data->ctx);
}
ctx = pango_x_get_context(display);
layout = pango_layout_new(ctx);
if (data->font != NULL) {
pango_font_description_free(data->font);
}
data->font = pango_font_description_copy(fontdesc);
pango_layout_set_font_description(layout, data->font);
/* Estimate for ASCII characters. */
pango_layout_set_text(layout,
VTE_DRAW_SINGLE_WIDE_CHARACTERS,
strlen(VTE_DRAW_SINGLE_WIDE_CHARACTERS));
pango_layout_get_extents(layout, &ink, &logical);
draw->width = logical.width;
draw->width = howmany(draw->width,
strlen(VTE_DRAW_SINGLE_WIDE_CHARACTERS));
iter = pango_layout_get_iter(layout);
draw->height = PANGO_PIXELS(logical.height);
draw->ascent = PANGO_PIXELS(pango_layout_iter_get_baseline(iter));
pango_layout_iter_free(iter);
/* Estimate for CJK characters. */
full_string = g_string_new(NULL);
for (i = 0; i < G_N_ELEMENTS(full_codepoints); i++) {
g_string_append_unichar(full_string, full_codepoints[i]);
}
pango_layout_set_text(layout, full_string->str, full_string->len);
pango_layout_get_extents(layout, &ink, &logical);
full_width = howmany(logical.width, G_N_ELEMENTS(full_codepoints));
g_string_free(full_string, TRUE);
/* If they're the same, then we have a screwy font. */
if (full_width == draw->width) {
/* add 1 to round up when dividing by 2 */
draw->width = (draw->width + 1) / 2;
}
draw->width = PANGO_PIXELS(draw->width);
iter = pango_layout_get_iter(layout);
if (draw->height == 0) {
draw->height = PANGO_PIXELS(logical.height);
}
if (draw->ascent == 0) {
draw->ascent = PANGO_PIXELS(pango_layout_iter_get_baseline(iter));
}
pango_layout_iter_free(iter);
_vte_debug_print(VTE_DEBUG_MISC,
"VtePangoX font metrics = %dx%d (%d).\n",
draw->width, draw->height, draw->ascent);
g_object_unref(layout);
g_object_unref(ctx);
}
